References

• 2009The PRISMA Statement for Reporting Systematic Reviews and Meta-Analyses of Studies That Evaluate Health Care Interventions: Explanation and Elaboration28,094 cited
• 2015Preferred reporting items for systematic review and meta-analysis protocols (PRISMA-P) 2015 statement26,189 cited
• 2016Rayyan—a web and mobile app for systematic reviews25,980 cited
• 2015Preferred reporting items for systematic review and meta-analysis protocols (PRISMA-P) 2015: elaboration and explanation13,108 cited
• 2009The PRISMA statement for reporting systematic reviews and meta-analyses of studies that evaluate health care interventions: explanation and elaboration10,571 cited
• 2007Development of AMSTAR: a measurement tool to assess the methodological quality of systematic reviews4,376 cited
• 2011United States Agency for International Development1,243 cited
• 2013Finding What Works in Health Care: Standards for Systematic Reviews949 cited
• 2013Searching for grey literature for systematic reviews: challenges and benefits814 cited
• 1994Users' Guides to the Medical Literature813 cited
• 2013PRISMA for Abstracts: Reporting Systematic Reviews in Journal and Conference Abstracts706 cited
• 2016What is an evidence map? A systematic review of published evidence maps and their definitions, methods, and products657 cited
• 2016Searching and synthesising ‘grey literature’ and ‘grey information’ in public health: critical reflections on three case studies